Description
The Atmel AT88SC0204CA member of the Atmel CryptoMemory® family is a high-performance secure memory providing 2Kbit of user memory with advanced security and cryptographic features built in. The user memory is divided into four 64-byte zones, each of which may be individually set with different security access rights or effectively combined together to provide space for one to four data files. The AT88SC0204CA features an enhanced command set that allows direct communication with microcontroller hardware two-wire interface thereby allowing for faster firmware development with reduced code space requirements.

Features
• One of a family of devices with user memories from 1Kbit to 8Kbit
• 2Kbit (256-byte) EEPROM user memory
• Four 512-bit (64-byte) zones
• Self-timed write cycle
• Single byte or 16-byte page write mode
• Programmable access rights for each zone
• 2Kbit configuration zone
• 37-byte OTP (One-time Programmable) area for user-defined codes
• 160-byte area for user-defined keys and passwords
• High security features
• 64-bit mutual authentication protocol (under license of ELVA)
• Cryptographic Message Authentication Codes (MAC)
• Stream encryption
• Four key sets for authentication and encryption
• Eight sets of two 24-bit passwords
• Anti-tearing function
• Voltage and frequency monitors
• Smart card features
• ISO 7816 Class B (3V) operation
• ISO 7816-3 asynchronous T=0 protocol (Gemplus® Patent) *
• Multiple zones, key sets and passwords for multi-application use
• Synchronous two-wire serial interface for faster device initialization *
• Programmable 8-byte answer-to-reset register
• ISO 7816-2 compliant modules
• Embedded application features
• Low voltage supply: 2.7V – 3.6V
• Secure nonvolatile storage for sensitive system or user information
• Two-wire serial interface (TWI, 5V compatible)
• 1.0MHz compatibility for fast operation
• Standard 8-lead plastic packages, green compliant (exceeds RoHS)
• Same pin configuration as Atmel® AT24CXXX Serial EEPROM in SOIC and PDIP packages
• High reliability
• Endurance: 100,000 cycles
• Data retention: 10 years
• ESD protection: 2,000V min